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<!--
https://bugzilla.mozilla.org/show_bug.cgi?id=944821
-->
<head>
  <meta charset="utf-8">
  <title>asm.js browser tests</title>
  <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
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<body>
  <a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=944821">asm.js browser tests</a>
  <p id="display"></p>
  <div id="content" style="display: none"></div>
  <pre id="test"></pre>

  <script>
  var jsFuns = SpecialPowers.Cu.getJSTestingFunctions();

  var assertCacheHit = false;

  // generate four slightly different big asm.js modules and compile them async
  // so that we can hit the asm.js cache.

  var code = "function f() { 'use asm';\n";
  for (var i = 0; i < 5000; i++)
    code += "function g" + i + "() { return " + i + "}\n";
  ok(code.length > 100000, "code is long enough to definitely hit the cache");

  const N = 4;

  var codes = [];
  for (var i = 0; i < N; i++) {
    var code2 = code;
    code2 += "return g" + i + ";\n";
    code2 += "}\n";
    code2 += "ok(jsFuns.isAsmJSModule(f), 'f is an asm.js module')\n";
    code2 += "if (assertCacheHit) ok(jsFuns.isAsmJSModuleLoadedFromCache(f), 'cache hit');\n";
    code2 += "var gX = f();\n";
    code2 += "ok(jsFuns.isAsmJSFunction(gX), 'gX is an asm.js function')\n";
    code2 += "ok(gX() === " + i + ", 'gX returns the correct result')\n";
    code2 += "finishedEvalAsync();\n";
    codes.push(code2);
  }

  function evalAsync(code) {
    var blob = new Blob([code], {type:"application/javascript"});
    var script = document.createElement('script');
    script.src = URL.createObjectURL(blob);
    document.body.appendChild(script);
  }

  var finishedCount = 0;
  function finishedEvalAsync() {
    finishedCount++;

    if (finishedCount < 1 || finishedCount > 2*N) {
      throw "Huh?!";
    } else if (finishedCount == N) {
      assertCacheHit = true;
      for (var i = 0; i < N; i++)
        evalAsync(codes[i]);
    } else if (finishedCount == 2*N) {
      SimpleTest.finish();
    }
  }

  function runTest() {
      for (var i = 0; i < N; i++)
        evalAsync(codes[i]);

      SimpleTest.waitForExplicitFinish();
  }

  if (!jsFuns.isAsmJSCompilationAvailable()) {
      ok(true, "isAsmJSCompilationAvailable is false, skipping this test!");
  } else {
      runTest();
  }
  </script>

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